JP4344963B2 - Metal can manufacturing method and multistage necking processing apparatus used in the manufacturing method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a method for manufacturing a metal can that deforms a body portion of a metal can, and more specifically, a method for manufacturing a metal can that is deformed by drawing processing on a body portion of a beverage can or an aerosol can, and the method thereof The present invention relates to a multi-stage necking apparatus used in a manufacturing method .
[0002]
[Prior art]
Conventionally, as a method for producing a metal can that gives various changes to the body of a metal can such as a beverage can or an aerosol can and improves the design, in the case of a beverage can or an aerosol can, for example, a urethane can is used as a beverage can, There were a bulge forming method which is a method of inserting into an aerosol can, compressing urethane rubber or the like and expanding the body part from the inside, and a magnetic wave forming method of inserting a coil into the beverage can and expanding from the inside.
[0003]
However, since any of the above-described processing methods cannot be formed in an apparatus in a normal metal can forming process, there is a disadvantage that a dedicated machine or a special apparatus for processing is required, and the apparatus is expensive. In addition, there is a problem that the equipment is complicated and the production efficiency is poor.
[0004]
The present invention has such has been made in view of the conventional problem, it can be utilized multi-stage necking equipment, inexpensive high production efficiency, without the need for complex equipment, deforming the barrel It aims at providing the manufacturing method of the metal can which is given.
[0005]
[Means for Solving the Problems]
In order to solve this problem, the present invention is characterized in that the specific solution corresponding to the invention described in claim 1 is an outer periphery in the vicinity of the bottom of a metal can which is an intermediate molded body such as a bottomed cylindrical beverage can or an aerosol can. The metal can is then subjected to a necking process in the vicinity of the opening of the metal can, and further subjected to a drawing process on the outer periphery of the metal can near the shoulder, and finally, the opening is subjected to a flange process or a curling process. In the manufacturing method of a metal can, characterized in that a support for supporting the opening of a metal can which is an intermediate formed body such as a beverage can and an aerosol can on a disk-shaped tool mounting table , necking, curling tool for flanging tool or curling for the series of aperture-type and flanging for drawing is provided at equal intervals in the circumferential direction, before climate The support in the mounting table, to each part of the series of aperture-type and flanging tool or curled portion facing the turntable includes a bottom drawing die and grips for holding for deep drawing bottom of a metal can The tool mounting table and the turntable are relatively close to each other in the axial direction, and the bottom of the metal can whose opening is supported by the support is formed by the bottom drawing mold, and the bottom is held by the grip. A metal can characterized by using a multi-stage necking apparatus in which the opening of the metal can is formed by the series of drawing dies and flange forming tools or curling, and the metal can is sent to the next process after being separated It is a manufacturing method.
[0006]
A specific problem corresponding to the invention of claim 2 is that the outer periphery in the vicinity of the bottom of a metal can, which is an intermediate molded body such as a bottomed cylindrical beverage can or an aerosol can, is subjected to drawing, and then the metal Manufacturing of a metal can characterized by performing drawing processing near the opening and shoulder of the can, further necking the opening of the metal can, and finally applying flange processing or curling processing to the opening. In the method, on a disk-shaped tool mounting table, a support for supporting the opening of a metal can which is an intermediate formed body such as a beverage can and an aerosol can, a series of steps for drawing and necking the vicinity of the opening iris and curling tool for flanging tool or curling for flanging, provided at equal intervals in the circumferential direction, the supporting before Symbol tool mounting table Ingredients, to each part of a series of drawing die and the turntable facing the flanging tool or curled portion, ,, the tool attachment comprises a bottom drawing die and grips for holding for deep drawing bottom of a metal can The table and the turntable are relatively close to each other in the axial direction, and the bottom of the metal can whose opening is supported by the support tool is formed by the bottom drawing mold, and the bottom of the metal can which is held by the grip A metal can manufacturing method characterized by using a multi-stage necking apparatus in which an opening is formed by the series of drawing dies and flange forming tools or curling, and is separated and sent to the next process. is there.
[0007]
A specific solution corresponding to the invention of claim 3 is a method of manufacturing a metal can characterized in that the bottomed cylindrical metal can is a beverage can manufactured by drawing or drawing and ironing. .
[0008]
A specific problem corresponding to the invention of claim 4 is a method for producing a metal can, wherein the bottomed cylindrical metal can is an aerosol can produced by impact molding.
[0009]
A specific solution corresponding to the invention of claim 5 is composed of a disk-shaped tool mounting table and a turntable facing the tool mounting table, and a beverage can and an aerosol are formed on the disk-shaped tool mounting table. For a support for supporting the opening of a metal can that is an intermediate formed body such as a can, a series of drawing molds for drawing and necking the vicinity of the opening , and a flange forming tool for flange forming or curling curling processing tool is provided at equal intervals in the circumferential direction, the support prior SL tool mounting table, to each part of a series of drawing die and the turntable facing the flanging tool or curling unit, A bottom drawing mold for drawing the bottom of the metal can and a grip for holding, the tool mounting table and the tar And table approaches the axial direction relative to the bottom of the support supported metal cans open at tool with molding in the bottom drawing die, the opening of the metal can which is held to the bottom in the grip The metal can formed by the series of drawing molds and flange forming tools or curling process and separated and sent to the next process, and a metal can which is an intermediate formed body such as a bottomed cylindrical beverage can and an aerosol can The outer periphery in the vicinity of the bottom can be subjected to drawing, and then a series of drawing can be applied to the outer periphery in the vicinity of the opening and the shoulder of the metal can, and finally the opening can be subjected to flange processing or curling processing. This is a multistage necking apparatus characterized by the above.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings. 1 to 5 are drawings showing a first embodiment of the present invention. In the first embodiment, the bottomed cylinder is moved by approaching / separating between the tool mounting table 4 of the multistage necking apparatus 9 shown in FIGS. 9 and 10 and the turntable 7 facing the tool mounting table 4. It is sectional drawing which shows the state which gave the outer periphery of the bottom part 2 vicinity of the drink can 1 which is a shape-shaped metal can. The beverage can 1 has already been subjected to a cupping process in which a punched disk is drawn into a cup shape, a drawing process in which the thickness of the body portion is reduced to a thin wall, or a drawing and ironing process. It is a beverage can as an intermediate molded body.
[0011]
FIG. 1 shows a first step of the first embodiment. An opening 3 of a beverage can 1 as an intermediate formed body is attached to a support 5 attached on the circumference of a tool attachment table 4. The entire beverage can 1 is supported, and the bottom portion 2 of the beverage can 1 is fitted in a metal holder 8 attached to the turntable 7 by the mutual action of the tool-equipped table 4 and the turntable 7. FIG. 5 is a cross-sectional view showing a state in which a bottom drawing portion 2a is formed by drawing on the outer periphery of the bottom drawing die 6 in the bottom drawing die 6; That is, the beverage can 1 as an intermediate molded body shown in FIG.
[0012]
FIG. 2 shows the second step of the first embodiment. The grip 10 attached on the circumference of the turntable 7 supports the bottom 2 of the beverage can 1 as an intermediate molded body, and the beverage. The core 11 is inserted into the opening 3 of the can 1, and the outer periphery in the vicinity of the opening 3 is necked by the drawing die 12, whereby a necking portion 3 a is formed in the opening 3. The drawing mold 12 is fitted in a mold holder 13, and the mold holder 13 is mounted on the circumference of the tool mounting table 4. That is, the beverage can 1 as an intermediate molded body shown in FIG. In molding, air may be supplied into the beverage can 1 from the air hole 18 of the core 11. In some cases, the core 11 is molded without the core 11.
[0013]
FIG. 3 shows the third step of the first embodiment. The bottom portion 2 of the beverage can 1 is supported on the grip 10 attached on the circumference of the turntable 7, and the vicinity of the shoulder portion of the beverage can 1. The outer periphery is drawn by the drawing die 14 to form the upper drawn portion 3b. Similarly, the drawing die 14 is fitted in a die holder 15, and this die holder 15 is attached on the circumference of the tool mounting table 4. Thereby, the drink can 1 as an intermediate molded body shown in FIG. 5 (C) is obtained. In this case as well, air may be supplied into the beverage can 1 from the air hole 19.
[0014]
FIG. 4 shows the fourth step of the first embodiment. The bottom portion 2 of the beverage can 1 is supported on the grip 10 attached on the circumference of the turntable 7, and the opening of the beverage can 1 is shown. By inserting the plurality of rotary pieces 17 of the flange forming tool 16 into the portion 3, the flange portion 3 c is formed in the opening 3. Thereby, the beverage can 1 as a finished product shown in FIG.
[0015]
FIG. 6 is a drawing showing a manufacturing method (order of manufacturing steps of an intermediate molded body) according to the second embodiment of this application. The difference from the first embodiment is that, in the second step (FIG. 6B), the opening 3 is not subjected to necking processing, and from the opening 3 to the vicinity of the shoulder, the outer periphery is a drawing type, By performing the drawing process, the upper drawing part 3d is formed, and then, in the third step (FIG. 6C), the necking part 3e is formed by performing the necking process on the opening part 3. Different points are formed.
[0016]
FIG. 7 is a view showing each example of the beverage cans 1a, 1b, and 1c manufactured by the manufacturing method according to the present invention. FIG. 7A is a front view showing a beverage can manufactured by the manufacturing method of the first or second embodiment according to the present invention. 7 (B) and 7 (C) are beverages that are other embodiments manufactured by applying vertical ribs or multi-face shapes to the inner peripheral surfaces of the drawing die 14 and the bottom drawing die 6 at regular intervals. It is the front view which showed can 1b, 1c. The vertical rib or the multi-face shape may be formed on both the upper diaphragm portion and the lower diaphragm portion, or may be formed on either one. Further, as shown in FIG. 7C, a vertical rib or a multi-face shape may be formed at the center of the body portion, and an upper diaphragm portion and a lower diaphragm portion may be formed.
[0017]
FIG. 8 is a view showing each example of the aerosol cans 20a, 20b, and 20c manufactured by the manufacturing method according to the present invention. FIG. 8A is a front view showing an aerosol can 20a manufactured by the manufacturing method of the first or second embodiment according to the present invention. In the first or second embodiment, a difference from the manufacturing process of the beverage can 1 is that, in the fourth process, a known curling tool (not shown) is used instead of the flange molding tool 16 for flange molding. The curling process is applied to the opening of the aerosol can 20. Needless to say, the curling tool can be easily mounted on the tool mounting table 4. FIGS. 8B and 8C show another embodiment 20b manufactured by applying vertical ribs or multi-face shapes to the inner peripheral surfaces of the drawing die 14 and the bottom drawing die 6 at equal intervals. , 20c. The vertical rib or the multi-face shape may be formed in both the upper diaphragm portion and the lower diaphragm portion, or may be formed in either one. Further, as shown in FIG. 8C, a vertical rib or a multi-face shape may be formed at the center of the body portion, and an upper diaphragm portion and a lower diaphragm portion may be formed.
[0018]
Although not the present invention , the above manufacturing method may be carried out by attaching a grip for supporting a metal can on a bolster at the lower part of a normally used press and attaching a drawing die to an upper ram. it can.
[0019]
【The invention's effect】
As described above, according to the present invention, by utilizing a multi-stage necking equipment normally used, without the need for expensive and complex equipment, efficiently manufacturing beverage cans, aerosol cans It has the effect that can be done.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a first step in a manufacturing method according to a first embodiment of the present invention.
FIG. 2 is a cross-sectional view showing a second step in the manufacturing method according to the first embodiment of the invention.
FIG. 3 is a sectional view showing a third step in the manufacturing method according to the first embodiment of the invention.
FIG. 4 is a sectional view showing a fourth step in the manufacturing method according to the first embodiment of the invention.
FIG. 5 is a cross-sectional view showing each intermediate molded body of a beverage can in the manufacturing method according to the first embodiment of the present invention.
FIG. 6 is a cross-sectional view showing each intermediate molded body of a beverage can in the manufacturing method according to the second embodiment of the present invention.
FIG. 7 is a front view showing examples of various beverage cans manufactured by the manufacturing method according to the present invention.
FIG. 8 is a front view showing examples of various aerosol cans manufactured by the manufacturing method according to the present invention.
FIG. 9 is a side view of a multi-stage necking apparatus used in the manufacturing method according to the present invention.
10 is a cross-sectional view taken along line AA in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Drink can 2 Bottom part 3 Opening part 4 Tool mounting table 5 Support tool 6 Bottom drawing type 7 Turntable 9 Multistage necking processing apparatus 10 Grip 12 14 Drawing type 16 Flange forming tool

Claims (5)

The outer periphery of the vicinity of the bottom of a metal can, which is an intermediate molded body such as a bottomed cylindrical beverage can or an aerosol can, is subjected to a drawing process, and then a necking process is performed in the vicinity of the opening of the metal can. In the manufacturing method of a metal can characterized by performing drawing processing on the outer periphery in the vicinity of the shoulder portion, and finally applying flange processing or curling processing to the opening,
On a disk-shaped tool mounting table, a support for supporting the opening of a metal can which is an intermediate formed body such as a beverage can and an aerosol can, a series of drawing molds for necking and drawing near the opening, and Flange forming tools for flange forming or curling processing tools for curling are provided at equal intervals in the circumferential direction,
Said support prior SL tool mounting table, to each part of the series of aperture-type and flanging tool or curled portion facing the turntable, for deep drawing a bottom of the metal can bottom iris and for holding With a grip,
The tool mounting table and the turntable are relatively close to each other in the axial direction, and the bottom portion of the metal can whose opening is supported by the support tool is formed by the bottom drawing mold, and the bottom portion is held by the grip. An opening of a metal can is formed by the series of drawing dies and a flange forming tool or curling process, and the metal can is separated and sent to the next process. Production method. To the outer periphery near the bottom of the metal can, which is an intermediate molded body such as a bottomed cylindrical beverage can, an aerosol can, etc., and then subjected to drawing near the opening and shoulder near the metal can, Furthermore, in the method of manufacturing a metal can characterized by performing necking processing on the opening of the metal can, and finally applying flange processing or curling processing to the opening.
On a disk-shaped tool mounting table, a support for supporting the opening of a metal can which is an intermediate formed body such as a beverage can and an aerosol can, a series of drawing molds for drawing and necking the vicinity of the opening , and Flange forming tools for flange forming or curling processing tools for curling are provided at equal intervals in the circumferential direction,
Said support prior SL tool mounting table, to each part of the series of aperture-type and flanging tool or curled portion facing the turntable, for deep drawing a bottom of the metal can bottom iris and for holding With a grip,
The tool mounting table and the turntable are relatively close to each other in the axial direction, and the bottom portion of the metal can whose opening is supported by the support tool is formed by the bottom drawing mold, and the bottom portion is held by the grip. An opening of a metal can is formed by the series of drawing dies and a flange forming tool or curling process, and the metal can is separated and sent to the next process. Production method.   The method for producing a metal can according to claim 1 or 2, wherein the bottomed cylindrical metal can is a beverage can produced by drawing or ironing.   The method for manufacturing a metal can according to claim 1 or 2, wherein the bottomed cylindrical metal can is an aerosol can manufactured by impact molding. A disk-shaped tool mounting table;
It consists of the tool mounting table and the opposite turntable,
On the disk-shaped tool mounting table, a support for supporting the opening of a metal can which is an intermediate formed body such as a beverage can and an aerosol can, a series of drawing molds for drawing and necking the vicinity of the opening And flange forming tools for flange forming or curling processing tools for curling processing are provided at equal intervals in the circumferential direction,
Said support prior SL tool mounting table, to each part of the series of aperture-type and flanging tool or curled portion facing the turntable, for deep drawing a bottom of the metal can bottom iris and for holding With a grip,
The tool mounting table and the turntable are relatively close to each other in the axial direction, and the bottom portion of the metal can whose opening is supported by the support tool is formed by the bottom drawing mold, and the bottom portion is held by the grip. The opening of the metal can is formed by the series of drawing molds and flange forming tools or curling processing, and the metal can is sent to the next step with separation,
Apply a drawing process to the outer periphery near the bottom of a metal can, which is an intermediate molded body such as a bottomed cylindrical beverage can or an aerosol can, and then a series of drawing processes near the opening near the opening and the shoulder near the metal can And finally, the opening can be flanged or curled.
Multi-stage necking processing equipment.

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